Adjustable table



(ModeL) H. E. BROWN. ADJUSTABLE TABLE.

Patented Dec. 5, 1882..

INVENTOR WITNESSES W M M fi ATTORNEYS.

UNITED STATES PATENT OFFICE.

HENRY E. BROWN, OF LANSING, MICHIGAN.

' ADJUSTABLE TABLE.

SPECIFICATION forming part of Letters Patent No. 268,616, dated December5, 1882.

Application filed December 15, 1880. (ModeL) To all whom it may concern:

Be it known that I, HENRY E. BROWN, of Lansing, Ingham county, State ofMichigan, have invented a new and Improved Adjustable Book-Support; andI do hereby declare that thefollowing is a full, clear, and exactdescription of the same.

The object ofmyinvention is to provide anew and improved adjustablebook-support which.

can be attached to a chair, table, or any projection'of a piece offurniture, can be adjusted higher and lower, and to have any desiredinclination.

The invention consists in the peculiar construction and arrangement ofparts, as hereinafter more fully set forth.

1n the accompanying drawings, Figure 1 is a side elevation of myimproved book-support, showing the manner in which it is attached to achair or other object. Fig. 2 is a longitudinal sectional elevation ofthe device for holdingthe table in the desired position. Fig. 3 is aplan view of the same. Fig. 4 is a [ongitudinal elevation of thepawl-arm and clamparm of the device.

An inwardly-flanged ring, H, is fastened to the under side of the tableB, and an annular flange of the top plate, I, of the lugs J J fits intothe space betwecnthe under side of the table B and the upper side of theflange of the ring H, as shown in Fig. 2, thus permitting the table tobe turned on the top plate, I. A shaft, 0, passing transversely througha segmental rack, D, on a rod, E, is also pivoted in the lugs J J. Asliding latch,K, with a wedgeshaped tooth, L, on the under side and lugsa a at the ends, is mounted in the top plate, I, directly below itsflange. Aspiral spring, M, acts upon this latch, drawing the tooth Linto the teeth of the segmental rack D. A flanged bar, N, is providedwith teeth I) I) on the inner sides of the flanges, as shown in Fig. 1.A pa wl-arm slides up and down on this bar N ,and can be held at anydesired height. The rod E passes through two guide-rings, P, of the barN, and its lower end rests upon the pawl-arm 0, as shown. Thepawl-clamps Q and Q slide vertically on the bar N, and can be held atany desired height in the samemanner as the pawlarm 0, for they are alsoprovided with the fulcrum-lugs c 0; but on the arm Q they are on thelower edge, as this arm receives an upward pressure but on the arm Qthey are on the upper edge, as this edge is pressed downward. A screw,R, passes through the lower clamp-arm, Q and by means of these arms Qand Q and the screw R the double ratchet,

bar N is attached to tables, chairs, or projecting parts of any otherpiece of furniture.

The sliding latch K is drawn in the direction of its length in order todisengage the tooth L from the segmental rack D, upon which the board Bis inclined, as may be required, and the latch K is then released andengages the tooth L with the segmental rack D, again thereby locking thetable orhoard B in the inclined position. As the annular top plate, I,fits loosely in the flanged ring H, the board or table B-can be turnedon this top plate, I. The pawl-arm 0 is raised more or less as thecircumstance may require, and the pawl-clamps Q or Q are-also adjustedhigher or lower on the bar N, as may be necessary, and then the same arefastened to a chair, table, or any other suitable projection by means ofa screw, It. The board or table can thus be adjusted at any desiredheight or inclination with the greatest care and in a very short time,and

will always be held firmly.

I am aware thata desk has been provided with a springpawl on its underside to work in a rigid rack on the desk-standards; but

What I claim as new is-- 1. In an adjustable table, the combination,

firmly secured at any angle, substantially as described.

2. In a book-support, the combination, with the flanged bar N, providedwith the guides P P, and with teeth on two opposite sides, of 5 thevertically-adjustable pawl-clamps Q and Q the screw R, thevertically-adjustable pawlarm 0, the rod -E, and the table B, pivoted tothe top of the rod E, all substantially as herein shown and described,and for the purpose set forth.

HENRY EDWARDS BROWN.

Witnesses:

GEO. W. PARKER, J AS. T. ZEALY.

